1. Put the video material with this effect into premiere.
2. Put the obscene video material into premiere, and put the color video under the video material.
3. Select the linear erase function in the effect interface and add it to the video material above.
4. Find the transition completion in the effect control. At the beginning of the video, we choose to add a key frame to the completion of the transition, as shown in the figure.
5. Then adjust to the end of the video, add a key frame to the transition again, and adjust the value to 100%.
6. Finally, click Play Video, so that our video comparison effect is completed.